>> sreenivasan: a number of syrian shells have landed in turkish territory since the conflict in syria began in march of 2011. the environmental protection agency announced much tighter new rules for soot pollution today. the agency is limiting the amount allowed into the atmosphere from smokestacks, diesel trucks, and other sources of heavy pollution by 20%. the new standard goes into effect in 2014. residents in coastal california faced another day of flooding after a "king" tide pulled the pacific ocean farther ashore than normal. residents waded through streets filled with ankle-deep seawater. the tides are the result of an occasional astronomical alignment. tides are expected to reach 7.3 feet, a level that hasn't been seen since 2008. it was a down day for wall street as investors steered clear of stocks because of uncertainty over the fiscal cliff negotiations between congress and the white house. the dow jones industrial average lost more than 35 points to close at 13,135. the nasdaq fell nearly 21 points to close at 2,971. for the week, both the dow and the nasdaq lost two ten